@Article{398990,
     author = "Alex Shkotin, Vladimir Ryakhovsky, Dmitry Kudryavtsev",
     title = "Towards Owl-Based Knowledge Representation in Petrology",
     year =  2012,
     volume =  ,
     number =  1,
     journal =  Studia Humana,
     pages =  s. 44-52,
    }